Do you have enabled cups option for ghostscript?
external jpeg7 v.s. internal jpeg6?

I have
PKG_DEFAULT_OPTIONS+=cups
in my mk.conf.
If I comment out this line I'm getting
===> Installing dependencies for ghostscript-8.64nb4
==========================================================================
The supported build options for ghostscript are:
cups fontconfig x11
The currently selected options are:
fontconfig x11
You can select which build options to use by setting PKG_DEFAULT_OPTIONS
or the following variable. Its current value is shown:
PKG_OPTIONS.ghostscript (not defined)
==========================================================================
and print/ghostscript is built fine.